Keystones — Lintel
Five GCSE retrieval questions · 24 February 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
790000
Answer: 7.9 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 8
Answer: (x + 4)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 13cm, angle = 43°. Find opposite
Answer: 12.cm -
4. Ratio Mixed ratio problems
Divide 105 in the ratio 2:1:2
Answer: 42, 21 and 42 -
5. Statistics Mean
Calculate the mean of: 25, 21, 41, 9, 24, 40
Answer: 26.7